Half to the eaton



2 Sheets-Sheet I 2.

(No Model.)

E. .R. TOMLINSON.

STEAM WHISTLE.

Patented June 18, 1889.

UNITED STATES PATENT OFFICE.

EDWVIN R. TOMLINSON, OF BRIDGEPORT, CONNECTICUT, ASSI'GNOR OF ONE- HALFTO THE EATON, COLE & BURNHAM COMPANY, OF SAME PLACE.

STEAM -WHISTL E.

SRECIFICATION forming part of Letters Patent No. 405,622, dated June 18,1889.

Application filed February 16, 1889. Serial No. 300,132. (No model.)

To all whom, it nwyconcern:

Be it known that I, EDWIN R. TOMLINSON, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inSteamhistles; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled [o in the art to which it appertains to make and use the same.

My invention relates to certain new and useful improvements instean1-wl1istles,but more particularly to that class of whistles wherebya chime or chord may be produced, and has for its objectto provide awhistle which shall be simple in its construction, economical in theexpenditure of steam, which may be adjusted relative to the steam-jet'for various 2o pressures of steam, and in which the tones andconsequently the chord, which is the sum total of the tones of theseveral tubes, may be varied at pleasure; and with these ends in view myinvention consists in the details of construction and combination ofelements hereinafter fully and in detail explained, and

then recited in the claims.

I11 order that those skilled in the art to which my invention appertainsmay more fully understand its construction and operation, I

will describe the same in detail, reference being had to theaccompanying drawings, which form a part of this specification, and inwhich- Figure 1. is a perspective; Fig. 2, a vertical section upon theline 1 y of Fig. 1; Fig. 3, aplan view of the top of the steam-bowl, andFig. 4

a transverse section at line x 00 of Fig. 2. v

Like reference-numerals denote the same parts in all the figures of thedrawings.

1 is the steam-bowl, having the lower end thereof interiorlyscrew-threaded for attachment to a steam-pipe. The top or cover 2 of thebowl has cut in the face thereof a series of round holes, one for eachwhistle-tube, and 5 from the bottom of said bowl there projects upwardthrough each of said holes a plug 3 smaller than the hole, so that anannular opening 4 is left around the plug for the proper escape of thesteam.

5 is a stem, preferentially screw-threaded into a hub or boss at thecenter of the bowlcover. Said stem is squared, as at 6, and isscrew-threaded at its top.

7 is a sleeve of square interior section, and provided at or near itslower end with out- 5 5 wardly-extending brackets 8, in which aremounted vertically-disposed resonant tubes 9, parallel with the centralstem. Each of these tubes is interiorly screw-threaded for the receptionof a threaded plug 10, havinga 6o drive-slot in its top surface, wherebyit may be moved in order to lengthen or shorten the tube. The sleeve 7fits overthe squared portion of the stem, and between thetube-supporting bracket and the bowl a spiral spring 11 is disposedabout the stem. A nut 12 runs upon the screw-threaded upper extremity ofthe stem, and by means of this nut the bracket and its tubes may beforced downward toward the bowl against the spring, so that the openends of the tubes may be properly disposed relative to the annularsteamways. Itwill of course be understood that the bracket sleeve slideson the squared portion of the stem each tube will be held always in thesame vertical plane relative to the bowl. One of the tubes in practiceis disposed. above each of the annular steamways, and, whether movednearer to or farther from said way, is always retained exactly over it.

In the operation of my whistle, by the employment of a separate jet ofsteam for each tube and disposing the tube directly over the way, allthe steam used is projected into one or the other of the tubes, so thatnone of it is wasted. Furtherinore,by the employment 01 one bowl onlyfor the pluralityof tubes, a much less surface is presented forcondensation than if a separate bowl were used for each resonant tube.

A whistle constructed as herein shown has also the advantages that it iscompact, and that it may be blown with but little pressure of steam,while at the same time both volume and variety of tone are produced.

I claim- 1. The combination, with the st-ealmbowl, the same having inits upper surface a plurality of annular steamways leading outward fromsaid bowl, of the squared vertical stem, we the bracket arranged uponsaid squared portion, the tubes secured in said brackets, one

over each steamway, and means, as described,

for raising and lowering the bracket and tubes, substantially as setforth.

2. The combination, with the steam-bowl, of the pierced cover at the topthereof, the plugs arranged within said bowl and projecting upwardthrough said holes, whereby annular steam-exits are afforded, thecentral stem mounted upon said bowl, and the plurality of tubes mountedon said stem and arranged one over each of the annular steamexits,substantially as set forth.

3. The combination, with the bowl having the plurality of annularsteam-exits in the upper face thereof, of the outwardly-projectingstem", squared for aportion of its length, the bracket mounted upon saidsquared portion, the resonant tubes secured in said bracket, one aboveeach steam-exit, the spring coiled about the stem and pressing upwardagainst the bracket, and the nut screwthreaded upon the top of the stemand adapted to control the position of the bracket, substantially asspecified.

4. The combination, with the, bowl having the steam-exits formedtherein, of the stem, the plurality of tubes arranged about said stem,each tube interiorly screw-threaded and provided with a movable plug,whereby the tone of the tube may be varied, and the spring and nut forthe elevation or depression of the tubes, substantially as set forth.

i In testimony whereof I affix my signature in presence of twowitnesses.

EDWIN R. TOM-LINSON.

Witnesses:

S. H. HUBBARD, I M. C. HINOHCLIFFE.

